1. You can now help support WorldwideDX when you shop on Amazon at no additional cost to you! Simply follow this Shop on Amazon link first and a portion of any purchase is sent to WorldwideDX to help with site costs.
    Dismiss Notice

Where to source a replacement Toko LA165?

Discussion in 'General CB Services Discussion' started by Dmans, Jun 11, 2018.

  1. Dmans

    Dmans Member

    Joined:
    Jan 22, 2017
    Messages:
    59
    Likes Received:
    21
    To All,
    One of my many fleabay scores is sick. It is a TRC-452. Cool little unit with an 858 chip. I think I have $7.00 in it (for my own entertainment and brain exercise) counting the purchase (with free shipping!) and a handful of new electrolytics. It does receive and has transmitted a handful of times (with shockingly very loud audio and swing) but I have tracked it's transmitting issues to a frozen/cracked ferrite insert in the L2 position-triggering the IS (Instant Stop per the manual-what a HOOT!) I can't seem to locate a new LA165 or technical specs on this tuning coil either. It seems Toko is now Murata and their parts search page is not very friendly or forthcoming.

    I do have a couple of dead ones that are standing by as organ donors-one of which is an EPT295013Z chassis(with too many lifted traces) that has already given up his DC power socket so that a Kenwood TR7800 may live and a chassis mount S0239 and a couple transistors so that a TRC49 (Pro-Niner) may live.



    Strictly looking at color codes of tuning coils, the 2950's L17 is white as is the Trc452's L2. Not sure if this means much? Although the L17 from the 2950 is a smaller package, I am sure size can be overcome. Where there is a will, there is a way!

    Any and all help is much appreciated. May be time to troll fleabay for more deals (with Free Shipping!)

    73's
    David
     

  2. nomadradio

    nomadradio Analog Retentive

    Joined:
    Apr 3, 2005
    Messages:
    1,522
    Likes Received:
    941
    A quick look at my notes says LA165 a 16 MHz VCO coil.

    The color coding doesn't indicate which ones you can interchange, most of the time.

    L17 in the 2950 does pretty much the same job and at the same frequency. I don't have a cross-reference to confirm you can sub it for the LA165

    Might work.

    73
     
  3. Dmans

    Dmans Member

    Joined:
    Jan 22, 2017
    Messages:
    59
    Likes Received:
    21
    Nomad,
    I haven't studied the 2950 schematic but just a quick peek this afternoon at the board revealed the "white" coil. It seems I have seen some literature recently showing color codes of tuning coils but really can't remember where I saw it???

    Maybe it was here:
    http://pdf1.alldatasheet.com/datasheet-pdf/view/82880/TOKO/E544ENAS-100011.html

    I guess I have nothing to lose by trying it. Best of all no shipping on these parts!

    Thanks for your response.

    73's
    David
     
  4. unit_399

    unit_399 EL CAPO

    Joined:
    Jun 17, 2008
    Messages:
    1,357
    Likes Received:
    595
    Check out Ken's Electronics. On their coil page they list an LA165 but show sold out. Lots of times if you call they have them but never updated their site.

    https://www.kenselectronics.com/lists/coils.htm

    Scroll down until you get to the LA coil section and find LA165. They list them for about 5 bucks (which is a lot for a 7 buck radio.) If they still show sold out, give them a call and ask. Worth a shot.

    - 399
     
    Dmans likes this.
  5. nomadradio

    nomadradio Analog Retentive

    Joined:
    Apr 3, 2005
    Messages:
    1,522
    Likes Received:
    941
    Ken's cryptic cross-reference info on his catalog page suggests that you could use a "12017" coil found in any of a gazillion RCI-built radios with pc board numbers that start with EPT3600. Sometimes that part is marked without the first digit '1' as in "2017".

    Gotta measure the inductance of that one one of these days. Used to be able to get Toko-made 10mm coils like these from Digi-Key, but they disappeared after the lead-free fraud 12 or so years back.

    Many of the 'cans' like this with a tuning slug will contain more than one winding. This one contains just one winding. Only two of the five pns are connected to it. The other 3 pins only serve to hold it down.

    If the only problem is a cracked slug, there's a trick that's worth trying. The underside of this coil is open. The undamaged slotted lower end of the slug can be adjusted from there.

    But only after you unsolder and remove it from the pc board. If you back it out from below, and remove the broken fragments thoroughly, you can now flip it over and thread it into the hole from above. If you were careful enough getting it out, it may now work if you reinstall it.

    73
     
  6. Dmans

    Dmans Member

    Joined:
    Jan 22, 2017
    Messages:
    59
    Likes Received:
    21
    Worth a shot too. PLL board comes out first to access the solder side of the coil but has to be done to replace the coil or flip the slug.

    I did check Ken’s page a week or so ago but never called him. It may have actually been on Memorial Day-time flies!

    73’s
    David
     
  7. cb4ever104

    cb4ever104 Member

    Joined:
    Nov 1, 2011
    Messages:
    17
    Likes Received:
    0
  8. Onelasttime

    Onelasttime Well-Known Member

    Joined:
    Aug 3, 2011
    Messages:
    853
    Likes Received:
    350
    Kens is a 1-1.5 hour drive from my home depending on traffic. I have been there many times. He is nice guy. I am not sure if his mom is still alive but when last I saw Ken she was and I think she was in her 100's at the time or darn close. She was still riding a pedal trike daily. Small world!
     

Share This Page

  • About Us

    The WorldwideDX Radio Forum was originally established in 2001. We pride ourselves on welcoming Radio Hobby enthusiasts of all types, while offering unbiased, informative, and friendly discussion among the members. We are working every day to make sure our community is the best Radio Hobbyist's site.
  • Like us on Facebook

  • Premium VIP Member

    The management works very hard to make sure the community is running the best software, best designs, and all the other bells and whistles. Care to buy us a beer? We'd really appreciate it!

    Donate to us!